NLMO Series Dual-wavelength Narrow Linewidth Laser

RealStable® NLMO Series Multi-Mode Dual-Wavelength Narrow Linewidth Laser Module Product Introduction

1. Product Overview
The RealStable® NLMO Series multi-mode dual-wavelength narrow linewidth laser is a patented light source independently developed by RealLight. It is specially designed as an integrated dual excitation source for shifted excitation Raman difference spectroscopy (SERDS), dual-wavelength metrology and biomedical analytical instruments. The unit integrates two independent VBG wavelength-locked narrow linewidth optical cavities, built-in integrated TEC thermostatic cooling and switching control circuit. Single module supports rapid electronic switching between two wavelengths, eliminating the need for two separate lasers, greatly reducing equipment volume and system integration cost.
Two mature standard wavelength sets are available: 784/785 nm and 785/1064 nm, with customized dual-wavelength combinations supported. Compact and low-power design is equipped with PH2.0 hardware port and dual USB control channel. Fiber output is compatible with universal FC/PC and SMA905 connectors, suitable for mass integration of desktop spectrometers, portable field detectors and medical optical instruments. Matched with full RL-RP Raman probes, it forms a complete dual-wavelength Raman detection system to satisfy customized development demands of instrument manufacturers.

2. Core Product Advantages
2.1 Dual optical path switching in single module to simplify system architecture
Two independent narrow linewidth resonant cavities are integrated into one unit. Electronic control enables fast wavelength switching, replacing the conventional dual-laser discrete layout. It saves internal installation space and eliminates complicated design of dual power supply, dual timing synchronization and dual optical calibration, cutting hardware cost and commissioning difficulty significantly. It serves as the dedicated core light source for SERDS differential Raman systems.

2.2 Synchronous high spectral purity for precise anti-interference measurement
Both laser channels adopt VBG wavelength locking technology with linewidth below 0.1 nm per wavelength and side-mode suppression ratio up to 40 dB for excellent stray light rejection. The adjacent 784/785 nm combination perfectly fits SERDS technology, which removes fluorescence and baseline artifacts via dual-spectrum difference calculation and improves SNR of weak-signal samples. The 785/1064 nm long-short wavelength set distinguishes organic and inorganic substances for synchronous analysis of mixed materials. Wavelength tolerance of each channel is controlled within ±0.5 nm.

2.3 Closed-loop TEC temperature control for long-term wavelength & power stability
Independent closed-loop TEC cooling system is embedded. Temperature drift is less than ±0.1 ℃ over 4-hour continuous operation, wavelength stability of both channels reaches ±7 pm, and peak-to-peak power fluctuation is less than ±2%. Balanced output power ensures high repeatability of long-time data acquisition without frequent calibration, meeting strict standards of quantitative analysis and metrology calibration.

2.4 Miniature low-power form factor for compact equipment
Overall dimension is only 86×63.5×32 mm with weight below 150 g and typical power consumption less than 5 W, operating on low-voltage 5 VDC / 2A power supply. Output power is continuously adjustable from 0 to 100%, and stable emission is available after 15-minute warm-up. It can be easily embedded into miniature portable devices and desktop micro-analyzers without bulky heat dissipation units.

2.5 Dual standardized control modes for automated linkage
PH2.0 12Pin I/O hardware interface and USB digital communication are supported simultaneously. Wavelength switching, power regulation, equipment status reading and multi-instrument timing synchronization can be realized via upper computer or external trigger level, facilitating secondary development of automatic production lines and imaging spectrometers. The 105 μm large-core multi-mode fiber with NA 0.22 delivers high light collection efficiency for large-area sample testing.

2.6 Wide temperature & humidity tolerance for stable indoor & outdoor operation
Standard operating temperature ranges from 10 ℃ to 35 ℃ (heat sink required); storage temperature 0~55 ℃ with relative humidity 0~80% RH. Stable performance is maintained in constant-temperature labs and room-temperature portable field devices, without wavelength shift or power attenuation caused by minor ambient fluctuations.

3. Main Application Fields
3.1 Differential Raman Spectroscopy (SERDS) (Core Application)
The adjacent 784/785 nm dual-wavelength variant acts as exclusive excitation source for SERDS systems. It eliminates strong fluorescence background of minerals, polymers and biological samples to boost detection accuracy of trace substances, applicable to laboratory desktop Raman, portable field detectors and hazardous chemical rapid screening equipment.

3.2 Dual-Wavelength Metrology & Synchronous Material Characterization
785/1064 nm long-short wavelength set acquires synchronous Raman signals at visible and near-infrared bands to distinguish organics, inorganics, carbon materials and battery components, ideal for material laboratories and quality inspection metrology instruments.

3.3 Biomedical Optical Instruments
Used for dual-wavelength fluorescence imaging of biological tissues, cellular spectral analysis and minimally invasive diagnosis optical excitation. Wavelength switching reduces equipment volume, matching compact medical detection devices.

4. Product Summary
Built on five core strengths — single-module electronically switchable dual optical paths, synchronous ultra-narrow linewidth of both channels, pm-level wavelength stability, miniature low-power design and dual standardized control modes — the NLMO series solves traditional dual-light-source pain points including large footprint, complicated commissioning and high cost. Two mature standard wavelength sets cover mainstream demands of SERDS, material characterization and medical optics, with customized wavelength combinations available. Standard communication and fiber interfaces simplify equipment integration, and wide environmental adaptability fits both laboratory and portable field devices. It is the preferred domestic dedicated excitation source for SERDS differential Raman and dual-wavelength analytical instruments. Matched with full RL-RP Raman probes to form complete detection systems, it supports mass OEM matching for analytical and medical equipment manufacturers.